package com.tanhua.dubbo.server.service;

import cn.hutool.core.util.StrUtil;
import cn.hutool.http.HttpRequest;
import cn.hutool.http.HttpResponse;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.tanhua.dubbo.server.config.HuanXinConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Service
@Slf4j
public class TokenService {
    @Autowired
    private RedisTemplate<String, String> redisTemplate;

    private static final String REDIS_KEY = "HX_TOKEN";

    @Autowired
    private HuanXinConfig huanXinConfig;
    /**
     * 获取token，先从redis中获取，如果没有，再去环信接口获取
     *
     * @return
     */
    public String getToken(){
        String token=redisTemplate.opsForValue().get(REDIS_KEY);
        if(StrUtil.isNotEmpty(token))
            return token;

        return this.refreshToken();

    }

    public String refreshToken() {
        String targetUrl = this.huanXinConfig.getUrl() +
                this.huanXinConfig.getOrgName() + "/" +
                this.huanXinConfig.getAppName() + "/token";
        Map<String, Object> param = new HashMap<>();

        param.put("grant_type", "client_credentials");
        param.put("client_id", this.huanXinConfig.getClientId());
        param.put("client_secret", this.huanXinConfig.getClientSecret());
        param.put("ttl","36000");
        HttpResponse execute = HttpRequest.post(targetUrl).body(JSONUtil.toJsonStr(param)).timeout(20000)
                .execute();
        if(!execute.isOk()){
            log.error("刷新token失败~~~ ");
            return null;
        }
        String body = execute.body();
        if(StrUtil.isNotEmpty(body))
        {
            JSONObject jsonObject = JSONUtil.parseObj(body);
            String token=jsonObject.getStr("access_token");
            if (StrUtil.isNotEmpty(token)) {
                //将token数据缓存到redis中，缓存时间由expires_in决定
                //提前1小时失效
                long timeout = jsonObject.getLong("expires_in") - 3600;
                this.redisTemplate.opsForValue().set(REDIS_KEY, token, timeout, TimeUnit.SECONDS);

                return token;
            }
        }
        return null;


    }


}
